package com.atguigu.gulimall.seckill.schedule;

import com.atguigu.gulimall.seckill.service.SeckillService;
import lombok.extern.slf4j.Slf4j;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

import java.util.concurrent.TimeUnit;

/**
 * 秒杀商品的定时上架：
 *   每天晚上3点；上架最近三天需要秒杀商品
 *   当天 00:00:00 - 23:59:59
 *   明天 00:00:00 - 23:59:59
 *   后天 00:00:00 - 23:59:59
 */
@Slf4j
@Service
public class SeckillSkuScheduled {

    @Autowired
    SeckillService seckillService;

    @Autowired
    RedissonClient redissonClient;

    private final String upload_lock = "seckill:upload:lock";

    //幂等性处理
    @Scheduled(cron = "0 0 3 * * ?")   //凌晨3点执行一次
    //@Scheduled(cron = "0 * * * * ?")  //每分钟执行一次
//    @Scheduled(cron = "*/3 * * * * ?")  //每3秒执行一次
    public void uploadSeckillSkuLasest3Days(){
        //重复上架无需处理
        log.info("上架秒杀的商品信息。。。。");
        //分布式锁   状态己经更新完成，释放锁以后，其他人获取到就会拿到最新状态
        RLock lock = redissonClient.getLock(upload_lock);
        lock.lock(10,TimeUnit.SECONDS);
        try {
            seckillService.uploadSeckillSkuLasest3Days();
        }finally {
            lock.unlock();
        }


    }
}
